The calculated distance (air line) between Tuyên Quang and Vĩnh Yên is approximately 44 miles respectively 70 kilometers.
By car or train, the actual journey to Vĩnh Yên is certainly longer, as only the direct route (as the crow flies) between Tuyên Quang and Vĩnh Yên has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles